Air compressor



W. J. SMITH AIR COMPRESSOR Nov.. 20, 1928.

Filed Jan.4, 1928 2 Sheets-Sheet 2 INVENTOR,

MLL/AMJSM/TH.

BY I

7 m m A TTORNEY.

' 20 tion" they Patented Nov. 50, 1928.

UNITED STATES-"PATENT OFFICE,

WWII-SMITH,

or PHILLDELPHIAQ'PENNSYLVJA/NIIA, ASSIGNOR 'ro vINcEN'r s. CLYHEB, or- SOUDEBTON, PENNSYLVANIA.

' AIR comrnnsson.

' Application filed January This invention relatesto air compressors, pumps and motors, and it relates particularly to structures .of this kind in which the principal driven or driving parts are rotary m .5 their action. 1

The invention herein described and. claimed is identical with that disclosed in the abandoned application for patent filed February 1, 1921, Serial No. 441,625.

In the construction hereinafter described, I have for one object. to produce operating parts so formed and relatively aggrouped that they may safely be operated at'a high speed in order that when, for instance, em-

l ployed in an air compressor a large volume of air may be compressed in a short time, thus effecting economy in the cost of the motive power employed. Other objects are to provide working parts so formed that in operaare relieved from undue binding, friction and wear, and in whichusual wear of parts may by easy adjustment be compensated for. Another object is to provide in a machine of the kind refered to a compact inexpensive construction in which a maximum compressing or forcing surface is available when usad as a compressor or pump, or a large surface to receive impact of a moving liquid or fluid is exposed when used as a motor. Further, ing, a, support or standard, and worklng parts located in the casing, assembling of the parts and the substitution of a new part for one worn or injured may quickly be effected without requiring skillin such operations.

The invention is hereinafter described as embodied in aircom ressors, but an understanding of it will ma e clear its availability,

,40 and the advantages of its novel features, as a pump for forcing liquids or as a motor; The invention consists in the generically and specifically novel construction and combinations of parts substantially as herein described and illustrated in the accompanying drawing. In this drawing: v

Figure 1 is a central vertical sectional view of an air compressor constructed in accordance with my invention, the section being taken in line with the driving shaft on line 22 of Figure 1;

Figure 2 is a vertical sectional view taken at a right angle to that shown in Figure 1;

3 is a front view of the standard the object is to providea cas-' of such form that 4, 1928. Serial No. 244,766.

view of the standard or which they are mounted and to each other;

and/ l Figure 7 is a face view, showing the form of the abutments or vanes I The embodiment of my,invention herein shown includes an enclosing cylindrical cas- 1ng, a standard orbase dividing the casing and 'to which the latter is attached, and two disk heads arranged one on each side of the standard, eccentrically located in the casing, and abutments or vanes mounted in the heads and hearing at their outer ends against the inside face of the casing, the abutments or vanes of the respective heads being located at right angles to each other. The standard or main pontion of the frame of the compressor consists of a circular, body portion lhaving at its lower end a base 2, and

which project the adjusting screws 4. Located in the body 1 of the standard is an opening 5 which forms a bearing for the shaft 6 to which the'moving parts of the device are connected.

The casing employed is made in two parts secured to the standard. Onepart 7 which is formedwvith aperipheral flangeB receiV-, ing screws 9 by which it is attached to the standard, is of a width corresponding to that I of the disk head 10, beingsomewhat larger in diameter than the head so that whenthe latter is located eccentrically in the casing there is formed a crescent-shaped space 11, con-. stituting a compression chamber between the headand the inner face of the casing. The other part 12 of the casing, receiving a disk head 10 located herein similarly to that in the first part'has a flange 13 formin with the screws 9 means for securing it to t e standard, and is provided with an extension 14 having an opening therethrough for the reception of a shaft 15 and of a driving shaft 16 which is connected to the'shaft 15. p

at its top'end a transverse bar 3 through The holes in the sections of the casinfg which receive the attaching screws are pre erably somewhat larger than the screws, in order that by loosening the screws the casing may be moved up or down a short distance independently of the standard.

The disk heads are each formed integrally with their respective-shafts 6 and upon which they are mounted. Each disk head has formed in it a transverse channel 17 extending through the head, and of a width to receive and permit longitudinal sliding movements of the abutments or vanes 18. The two disk heads and their shafts are secured together by screw bolts passing through the parts, and the heads are so positioned in respect to each other that the chanfuel 17 of each head extends at a right angle and the walls of the channels, in order that T end and communicating with a passage 23 Cfl to that of the other.

The abutments or vanes 18 are made in two parts and the adjacent ends of the parts are spaced apart. Each part has in its inner end a socket 20 in which is located one end of a coil spring 21 under sufficient tension to force the parts outward to cause their respective outer ends to bear against the inner faces of the casing. i

The disk heads are intended to rotate fin the direction indicated by the arrow in Figure 2. In such rotation the abutments or vanes are moved through the spaces 11 in the casing, compressing-the air contained in such spaces. abutments are forced' to bear against the sides of the walls of the channels 17 and thefriction between the parts tends to obstruct the movements of the abutments radially of the disk heads and to result in wear of the contacting faces. In order to relieve the pressure of the vanes upon the walls of the chain nels, there is established a communication between those parts of the chambers 11 in advance of the vanes and the spaces between the faces of the vanes, rearward in respect of the direction of movement of the vanes,

there shall be maintained in such spaces a pressure of air equal to that created in the compression chamber b the movements of e vanes.' To accomplish this the forward face of eachvane section hasformed' in it a groove 22, extending inward from its outer extending through the of each vane section communicatin outer ends of t section.. The rear face has in it a chamber 24 with the passage 23. The e ohambers'are so located that they are always within the periphery of the walls of the channels disk heads, irrespective of the movements of the vanes. The construction described results in cushioning or balancing the vane sections by maintaining between them and the a pressure equal to that When this takes place, the the opposite side of the standard is a disa eating with the discharge .ingdisk head and shaft second disk headto the shaft of the a body of air under bearing on the front friction between the walls of the channels and the vane sections is reduced toa minimum.

In the assembling of the parts of the compressor the outer surfaces of the disk heads 10 bear against the inner faces of the casing sections at the upper portions of the sections,

in order-that there may be no communication between the intake and the exhaust, ends of the space in which the air is compressed by the operation ofthe vanes. Continued rotation of the heads in contact with the casing results in more or less wear of the parts which tends to establish a passage through which air compressed by the vanes would escape from the exhaust to the inlet end of the compression chamber; In order to comcharge port 27 joined to apassage28 communiends of the respective compression chambers.

The shaft 15 forming part of one of the disk heads 10, is hollow and receives the inner end of the driving shaft 16, the latter being held by'a'pin 29 passing through the two shafts. I

The driving shaft is packed in order to prevent escape of compressed air from the casing, as by a stufling box 31 located in the extensionl of the casing, and a gland 32. he construction of the compressor as described being such that the' operating parts are balanced, the device is capable of operat ing at high speed. Therefore, the driving shaft may be connected directly to and be stance, as an electric motor.

I claim:

- 1. In an air compressor, a standard having a bearing therein, chambers. formed. on opposite sides of the standard, a disk head having crosshead 3 of the standard and bearing on the flanges 8 and an integral shaft extending therefrom ar ranged in one of the chambers, and having its shaft located in the bearing, a correspondarranged in the oppositechamber, arid means. for connect" g the rst disk head. v 2. An air compressor comprising a casing, a revoluble dlsk.

head eccentrically mounted in the casing and normally bearing against ranged disk head attached to the shaft, such the inner face of the casing, and means wheredisk heads normally bearing against the 1nby the casing may be moved toward the head ner faces of the casing, and ad uSt-ing screws to compensate for wear between the parts. passing through-the crossbar and bearing on 3. In an air compressor, a standard havthe casing sections. ing a bearing therein and having a crossbar 5. In an air compressor, a standard having at its upper end, a sectional casing having the a bearing therein, two circular chambers parts t ereof attached to the standard, and formed one on each side of the standard, a' adjustin screws passing through the crossdisk head eccentrically arranged in' one of bar and aring on the casing sections. p the chambers and having an integral shaft 4. In an air compressor, a standard having extending therefrom and located in the beara bearing therein and having'acrossbar at its ing, a correspondin disk head and shaft ecupper end,asectional casing havingithe parts centrically arranged in the opposite chamthereof attached to the standard, a disk head her, and means for connecting the second disk having an inte al shaft arranged on. one side head tothe shaft of the first disk head. ofthe standar and having theashaft extend- In testimony whereof I aflix 'my si nature. ing into the bearing, and an oppositely ar-. WILLIAM J. S 1TH. 

